Bosch 2608580804 8-Piece Electricians Holesaw Set. A Fantastic Holesaw Set for Electricians. 1 x 11mm Hexagon Socket Adapter (Dia 32mm - 64mm). For Drilling in steel and cast iron, structural steel, alloyed and unalloyed aluminium, bronze, copper, PVC, acrylic glass and wood.
eBay